formbook | 64a8c9065258f70f7567b5d52da2738c6e63580cc64a95273b454f45addf50f5

Analysis

max time kernel
150s
max time network
157s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
29-01-2023 03:18

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General

Target

tmp.exe
Size

228KB
MD5

8b37c8c2c2beefd373d98526c700109a
SHA1

e5acac1ffd8ced2e30313a0e93129524dd91c952
SHA256

64a8c9065258f70f7567b5d52da2738c6e63580cc64a95273b454f45addf50f5
SHA512

f41ff902b633f2119c584290f3089922a828d546b1a484659225d2426c70f961993e305c911896d1abf738d87bfcd31dc51d18b1d9e692099d74644e6b2963eb
SSDEEP

6144:/Ya6qkxtNGqZnjsvzTXRDK6wgQ7js0YXQzf8PWFJMNXYSZm3k:/YUkEqZQH9KJgis0uRYSYk

Score

10^/10

formbook xloader u8ow loader persistence rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Campaign

u8ow

Decoy

uzhDDUNgg10rOh8rkUMGYiLuNnRWl9gwMQ==

bfkA4IUaSgYi7IA=

ezX5yHeR21O3h2RCgQ==

x3E4ntHeLMGQm0kdTi6PJtjOVS6Em8UaKA==

xJuAYwcZLAfqrVazWjvkirgFxDSf

qrGugLdannLYegX5dCtFMA==

i61nMddueAYi7IA=

RoNMKNhtdDWpeiYoaB37TPiHTLo=

RFj3UHHrDtAktSZhYku36opnsaMbNA==

lx0g+6RPl4jwwNPRPuTD

MyEQ4oGk6vXrMM4V

0IVWH0rfKe1J4nn6J9XB

SYVlN3Zrnq2OaWpDiQ==

fNa0jy3P8KQK25rpmwqd0t8=

UZuSZpW+9ffX9KXzmgqd0t8=

Vxf85YCWvYNZjkcDdCtFMA==

0gG1EzLP7/DrMM4V

WExRGVAEE6YS5tJkTxMhR636+A==

6Tv7U4QdURt1KUI+gw==

ooR7RXgsXPtaEutnaQ3efjIXmfJePavzIA==

Signatures

Formbook
Formbook is a data stealing malware which is capable of stealing data.
trojan spyware stealer formbook
Xloader
Xloader is a rebranded version of Formbook malware.
loader xloader

Xloader payload 3 IoCs

rat

Processes:

resource	yara_rule
behavioral1/memory/428-64-0x0000000000400000-0x000000000042C000-memory.dmp	xloader
behavioral1/memory/2036-72-0x0000000000080000-0x00000000000AC000-memory.dmp	xloader
behavioral1/memory/2036-76-0x0000000000080000-0x00000000000AC000-memory.dmp	xloader

Executes dropped EXE 3 IoCs

Processes:

rlgffyq.exerlgffyq.exemslnu.exe

pid process

684 rlgffyq.exe
428 rlgffyq.exe
1868 mslnu.exe
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.

Query Registry
T1012

System Information Discovery
T1082

Processes:

rlgffyq.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Control Panel\International\Geo\Nation rlgffyq.exe
Loads dropped DLL 6 IoCs

Processes:

tmp.exerlgffyq.exeWerFault.exe

pid process

112 tmp.exe
684 rlgffyq.exe
1852 WerFault.exe
1852 WerFault.exe
1852 WerFault.exe
1852 WerFault.exe

pid	process
684	rlgffyq.exe
428	rlgffyq.exe
1868	mslnu.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Control Panel\International\Geo\Nation	rlgffyq.exe

pid	process
112	tmp.exe
684	rlgffyq.exe
1852	WerFault.exe
1852	WerFault.exe
1852	WerFault.exe
1852	WerFault.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

colorcpl.exe

description	ioc	process
Key created	\Registry\Machine\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run	colorcpl.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\Z4NHYZYPTH = "C:\\Program Files (x86)\\Oy4nh\\mslnu.exe"	colorcpl.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

rlgffyq.exerlgffyq.execolorcpl.exe

description	pid	process	target process
PID 684 set thread context of 428	684	rlgffyq.exe	rlgffyq.exe
PID 428 set thread context of 1212	428	rlgffyq.exe	Explorer.EXE
PID 2036 set thread context of 1212	2036	colorcpl.exe	Explorer.EXE

Drops file in Program Files directory 2 IoCs

Processes:

colorcpl.exeExplorer.EXE

description	ioc	process
File opened for modification	C:\Program Files (x86)\Oy4nh\mslnu.exe	colorcpl.exe
File created	C:\Program Files (x86)\Oy4nh\mslnu.exe	Explorer.EXE

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

1852 1868 WerFault.exe mslnu.exe

pid	pid_target	process	target process
1852	1868	WerFault.exe	mslnu.exe

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

Processes:

colorcpl.exe

description	ioc	process
Key created	\Registry\User\S-1-5-21-3845472200-3839195424-595303356-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	colorcpl.exe

Suspicious behavior: EnumeratesProcesses 24 IoCs

Processes:

rlgffyq.execolorcpl.exe

pid	process
428	rlgffyq.exe
428	rlgffyq.exe
2036	colorcpl.exe
2036	colorcpl.exe
2036	colorcpl.exe
2036	colorcpl.exe
2036	colorcpl.exe
2036	colorcpl.exe
2036	colorcpl.exe
2036	colorcpl.exe
2036	colorcpl.exe
2036	colorcpl.exe
2036	colorcpl.exe
2036	colorcpl.exe
2036	colorcpl.exe
2036	colorcpl.exe
2036	colorcpl.exe
2036	colorcpl.exe
2036	colorcpl.exe
2036	colorcpl.exe
2036	colorcpl.exe
2036	colorcpl.exe
2036	colorcpl.exe
2036	colorcpl.exe

Suspicious behavior: MapViewOfSection 8 IoCs

Processes:

rlgffyq.exerlgffyq.execolorcpl.exe

pid process

684 rlgffyq.exe
428 rlgffyq.exe
428 rlgffyq.exe
428 rlgffyq.exe
2036 colorcpl.exe
2036 colorcpl.exe
2036 colorcpl.exe
2036 colorcpl.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

rlgffyq.execolorcpl.exeExplorer.EXE

description pid process

Token: SeDebugPrivilege 428 rlgffyq.exe
Token: SeDebugPrivilege 2036 colorcpl.exe
Token: SeShutdownPrivilege 1212 Explorer.EXE
Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

Explorer.EXE

pid process

1212 Explorer.EXE
1212 Explorer.EXE
Suspicious use of SendNotifyMessage 2 IoCs

Processes:

Explorer.EXE

pid process

1212 Explorer.EXE
1212 Explorer.EXE

pid	process
684	rlgffyq.exe
428	rlgffyq.exe
428	rlgffyq.exe
428	rlgffyq.exe
2036	colorcpl.exe
2036	colorcpl.exe
2036	colorcpl.exe
2036	colorcpl.exe

description	pid	process
Token: SeDebugPrivilege	428	rlgffyq.exe
Token: SeDebugPrivilege	2036	colorcpl.exe
Token: SeShutdownPrivilege	1212	Explorer.EXE

pid	process
1212	Explorer.EXE
1212	Explorer.EXE

pid	process
1212	Explorer.EXE
1212	Explorer.EXE

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

tmp.exerlgffyq.exeExplorer.EXEcolorcpl.exemslnu.exe

description	pid	process	target process
PID 112 wrote to memory of 684	112	tmp.exe	rlgffyq.exe
PID 112 wrote to memory of 684	112	tmp.exe	rlgffyq.exe
PID 112 wrote to memory of 684	112	tmp.exe	rlgffyq.exe
PID 112 wrote to memory of 684	112	tmp.exe	rlgffyq.exe
PID 684 wrote to memory of 428	684	rlgffyq.exe	rlgffyq.exe
PID 684 wrote to memory of 428	684	rlgffyq.exe	rlgffyq.exe
PID 684 wrote to memory of 428	684	rlgffyq.exe	rlgffyq.exe
PID 684 wrote to memory of 428	684	rlgffyq.exe	rlgffyq.exe
PID 684 wrote to memory of 428	684	rlgffyq.exe	rlgffyq.exe
PID 1212 wrote to memory of 2036	1212	Explorer.EXE	colorcpl.exe
PID 1212 wrote to memory of 2036	1212	Explorer.EXE	colorcpl.exe
PID 1212 wrote to memory of 2036	1212	Explorer.EXE	colorcpl.exe
PID 1212 wrote to memory of 2036	1212	Explorer.EXE	colorcpl.exe
PID 2036 wrote to memory of 616	2036	colorcpl.exe	cmd.exe
PID 2036 wrote to memory of 616	2036	colorcpl.exe	cmd.exe
PID 2036 wrote to memory of 616	2036	colorcpl.exe	cmd.exe
PID 2036 wrote to memory of 616	2036	colorcpl.exe	cmd.exe
PID 2036 wrote to memory of 860	2036	colorcpl.exe	Firefox.exe
PID 2036 wrote to memory of 860	2036	colorcpl.exe	Firefox.exe
PID 2036 wrote to memory of 860	2036	colorcpl.exe	Firefox.exe
PID 2036 wrote to memory of 860	2036	colorcpl.exe	Firefox.exe
PID 2036 wrote to memory of 860	2036	colorcpl.exe	Firefox.exe
PID 1212 wrote to memory of 1868	1212	Explorer.EXE	mslnu.exe
PID 1212 wrote to memory of 1868	1212	Explorer.EXE	mslnu.exe
PID 1212 wrote to memory of 1868	1212	Explorer.EXE	mslnu.exe
PID 1212 wrote to memory of 1868	1212	Explorer.EXE	mslnu.exe
PID 1868 wrote to memory of 1852	1868	mslnu.exe	WerFault.exe
PID 1868 wrote to memory of 1852	1868	mslnu.exe	WerFault.exe
PID 1868 wrote to memory of 1852	1868	mslnu.exe	WerFault.exe
PID 1868 wrote to memory of 1852	1868	mslnu.exe	WerFault.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Drops file in Program Files directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:1212

C:\Users\Admin\AppData\Local\Temp\tmp.exe
"C:\Users\Admin\AppData\Local\Temp\tmp.exe"
2⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:112

C:\Users\Admin\AppData\Local\Temp\rlgffyq.exe
"C:\Users\Admin\AppData\Local\Temp\rlgffyq.exe" C:\Users\Admin\AppData\Local\Temp\mewbf.gv
3⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:684

C:\Users\Admin\AppData\Local\Temp\rlgffyq.exe
"C:\Users\Admin\AppData\Local\Temp\rlgffyq.exe"
4⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:428

C:\Windows\SysWOW64\colorcpl.exe
"C:\Windows\SysWOW64\colorcpl.exe"
2⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Drops file in Program Files directory
- Modifies Internet Explorer settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2036

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\rlgffyq.exe"
3⤵
PID:616

C:\Program Files\Mozilla Firefox\Firefox.exe
"C:\Program Files\Mozilla Firefox\Firefox.exe"
3⤵
PID:860

C:\Program Files (x86)\Oy4nh\mslnu.exe
"C:\Program Files (x86)\Oy4nh\mslnu.exe"
2⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:1868

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1868 -s 124
3⤵
- Loads dropped DLL
- Program crash
PID:1852

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Program Files (x86)\Oy4nh\mslnu.exe
Filesize
6KB

MD5
44a7bf46a9c01d3e0486c93767b6cc0f

SHA1
3cc13566319f0d73f4931a101799862907cd361d

SHA256
b016acfefe7a25f43ec9f9e89bff4d03ea9470941e283b10599acb6769cf76b9

SHA512
e36053cba4c316a26a72857959c12db9813f1c1187c03d2ecfb545fb54fde6286302054b353a6aead3bb15429ffb6bc2d1bee68cb65cf8df7c0994ff3ffe0602

Download Submit
C:\Program Files (x86)\Oy4nh\mslnu.exe
Filesize
6KB

MD5
44a7bf46a9c01d3e0486c93767b6cc0f

SHA1
3cc13566319f0d73f4931a101799862907cd361d

SHA256
b016acfefe7a25f43ec9f9e89bff4d03ea9470941e283b10599acb6769cf76b9

SHA512
e36053cba4c316a26a72857959c12db9813f1c1187c03d2ecfb545fb54fde6286302054b353a6aead3bb15429ffb6bc2d1bee68cb65cf8df7c0994ff3ffe0602

Download Submit
C:\Users\Admin\AppData\Local\Temp\mewbf.gv
Filesize
5KB

MD5
3c244d8bf6174dbc41727abc9ece7acf

SHA1
797f05cbef6c579880841488a2ef85a8064db9fa

SHA256
fa3e5994908aed3ee28a15d4f45f396603fd9026db11a342a90c590f5d48a85b

SHA512
93030940192dcbe0e83895c89de7d57998199fdd6dc71d4dd76d62b2fbadff9aa2a43aea5797bc3d1b17afeda64104a202bde6255647f04a6cb42b8f5282b253

Download Submit
C:\Users\Admin\AppData\Local\Temp\rlgffyq.exe
Filesize
6KB

MD5
44a7bf46a9c01d3e0486c93767b6cc0f

SHA1
3cc13566319f0d73f4931a101799862907cd361d

SHA256
b016acfefe7a25f43ec9f9e89bff4d03ea9470941e283b10599acb6769cf76b9

SHA512
e36053cba4c316a26a72857959c12db9813f1c1187c03d2ecfb545fb54fde6286302054b353a6aead3bb15429ffb6bc2d1bee68cb65cf8df7c0994ff3ffe0602

Download Submit
C:\Users\Admin\AppData\Local\Temp\rlgffyq.exe
Filesize
6KB

MD5
44a7bf46a9c01d3e0486c93767b6cc0f

SHA1
3cc13566319f0d73f4931a101799862907cd361d

SHA256
b016acfefe7a25f43ec9f9e89bff4d03ea9470941e283b10599acb6769cf76b9

SHA512
e36053cba4c316a26a72857959c12db9813f1c1187c03d2ecfb545fb54fde6286302054b353a6aead3bb15429ffb6bc2d1bee68cb65cf8df7c0994ff3ffe0602

Download Submit
C:\Users\Admin\AppData\Local\Temp\rlgffyq.exe
Filesize
6KB

MD5
44a7bf46a9c01d3e0486c93767b6cc0f

SHA1
3cc13566319f0d73f4931a101799862907cd361d

SHA256
b016acfefe7a25f43ec9f9e89bff4d03ea9470941e283b10599acb6769cf76b9

SHA512
e36053cba4c316a26a72857959c12db9813f1c1187c03d2ecfb545fb54fde6286302054b353a6aead3bb15429ffb6bc2d1bee68cb65cf8df7c0994ff3ffe0602

Download Submit
C:\Users\Admin\AppData\Local\Temp\zkoclolbinv.obd
Filesize
196KB

MD5
7ae7dcc7e63caee1fd3da08154fa103d

SHA1
c2c152ce21732ad9be3c06d28de2aa28340a095a

SHA256
5395f4b1e2cdd4ab2cc06957df8e8f4264cfea3fbd7e6970ab9e9a6f0ff2d58b

SHA512
c707b92084a8bde6c11bfa36519389c017cda33b8e1223a116e3055549d7c713f05d16113f739e466c9d3d03dbc8b32058eee43c3caace8e8a6ab4adfb6c232b

Download Submit
\Program Files (x86)\Oy4nh\mslnu.exe
Filesize
6KB

MD5
44a7bf46a9c01d3e0486c93767b6cc0f

SHA1
3cc13566319f0d73f4931a101799862907cd361d

SHA256
b016acfefe7a25f43ec9f9e89bff4d03ea9470941e283b10599acb6769cf76b9

SHA512
e36053cba4c316a26a72857959c12db9813f1c1187c03d2ecfb545fb54fde6286302054b353a6aead3bb15429ffb6bc2d1bee68cb65cf8df7c0994ff3ffe0602

Download Submit
\Program Files (x86)\Oy4nh\mslnu.exe
Filesize
6KB

MD5
44a7bf46a9c01d3e0486c93767b6cc0f

SHA1
3cc13566319f0d73f4931a101799862907cd361d

SHA256
b016acfefe7a25f43ec9f9e89bff4d03ea9470941e283b10599acb6769cf76b9

SHA512
e36053cba4c316a26a72857959c12db9813f1c1187c03d2ecfb545fb54fde6286302054b353a6aead3bb15429ffb6bc2d1bee68cb65cf8df7c0994ff3ffe0602

Download Submit
\Program Files (x86)\Oy4nh\mslnu.exe
Filesize
6KB

MD5
44a7bf46a9c01d3e0486c93767b6cc0f

SHA1
3cc13566319f0d73f4931a101799862907cd361d

SHA256
b016acfefe7a25f43ec9f9e89bff4d03ea9470941e283b10599acb6769cf76b9

SHA512
e36053cba4c316a26a72857959c12db9813f1c1187c03d2ecfb545fb54fde6286302054b353a6aead3bb15429ffb6bc2d1bee68cb65cf8df7c0994ff3ffe0602

Download Submit
\Program Files (x86)\Oy4nh\mslnu.exe
Filesize
6KB

MD5
44a7bf46a9c01d3e0486c93767b6cc0f

SHA1
3cc13566319f0d73f4931a101799862907cd361d

SHA256
b016acfefe7a25f43ec9f9e89bff4d03ea9470941e283b10599acb6769cf76b9

SHA512
e36053cba4c316a26a72857959c12db9813f1c1187c03d2ecfb545fb54fde6286302054b353a6aead3bb15429ffb6bc2d1bee68cb65cf8df7c0994ff3ffe0602

Download Submit
\Users\Admin\AppData\Local\Temp\rlgffyq.exe
Filesize
6KB

MD5
44a7bf46a9c01d3e0486c93767b6cc0f

SHA1
3cc13566319f0d73f4931a101799862907cd361d

SHA256
b016acfefe7a25f43ec9f9e89bff4d03ea9470941e283b10599acb6769cf76b9

SHA512
e36053cba4c316a26a72857959c12db9813f1c1187c03d2ecfb545fb54fde6286302054b353a6aead3bb15429ffb6bc2d1bee68cb65cf8df7c0994ff3ffe0602

Download Submit
\Users\Admin\AppData\Local\Temp\rlgffyq.exe
Filesize
6KB

MD5
44a7bf46a9c01d3e0486c93767b6cc0f

SHA1
3cc13566319f0d73f4931a101799862907cd361d

SHA256
b016acfefe7a25f43ec9f9e89bff4d03ea9470941e283b10599acb6769cf76b9

SHA512
e36053cba4c316a26a72857959c12db9813f1c1187c03d2ecfb545fb54fde6286302054b353a6aead3bb15429ffb6bc2d1bee68cb65cf8df7c0994ff3ffe0602

Download Submit
memory/112-54-0x0000000075E31000-0x0000000075E33000-memory.dmp

Filesize
8KB

Download
memory/428-66-0x00000000003C0000-0x00000000003D1000-memory.dmp

Filesize
68KB

Download
memory/428-65-0x0000000000970000-0x0000000000C73000-memory.dmp

Filesize
3.0MB

Download
memory/428-64-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/428-62-0x0000000000420000-mapping.dmp

Download
memory/616-70-0x0000000000000000-mapping.dmp

Download
memory/684-56-0x0000000000000000-mapping.dmp

Download
memory/1212-67-0x0000000006460000-0x0000000006605000-memory.dmp

Filesize
1.6MB

Download
memory/1212-75-0x0000000002A80000-0x0000000002B28000-memory.dmp

Filesize
672KB

Download
memory/1212-77-0x0000000002A80000-0x0000000002B28000-memory.dmp

Filesize
672KB

Download
memory/1852-81-0x0000000000000000-mapping.dmp

Download
memory/1868-78-0x0000000000000000-mapping.dmp

Download
memory/2036-68-0x0000000000000000-mapping.dmp

Download
memory/2036-76-0x0000000000080000-0x00000000000AC000-memory.dmp

Filesize
176KB

Download
memory/2036-74-0x00000000005D0000-0x0000000000660000-memory.dmp

Filesize
576KB

Download
memory/2036-73-0x0000000001FE0000-0x00000000022E3000-memory.dmp

Filesize
3.0MB

Download
memory/2036-72-0x0000000000080000-0x00000000000AC000-memory.dmp

Filesize
176KB

Download
memory/2036-71-0x0000000000140000-0x0000000000158000-memory.dmp

Filesize
96KB

Download